I believe the problem arises when we take away or add to the Word of God. For instance when speaking about the Holy Ghost there are many who disregard the book of Acts and Jesus' instruction to born again believers to 'wait for the promise of the Father which saith he, You have heard of Me, for John truely baptized with water, but you shall be baptized with the Holy Ghost not many days hence' and later he says 'you shall receive power after that the Holy Ghost has come upon you' ( Acts Chapter 1 ) Alot of believers do not understand being totally filled with the Holy Ghost so they disregard the book of Acts and many have even said that its not for us today. However, we have no scripture which shows us that we are to disregard any part of the Bible. So the big issue comes into play when you have two different views, one view says this is the Word of God and I will read and study all of it and apply it to my life, and there are other groups who pick and choose what they read and hear. And its those groups who pick and choose which have led to numerous denominations being formed. And therein lies our biggest problem. But as for me and my house, we will serve the Lord, and we will live by his Word, not a portion of it, but the fullness of it. So yes, we will pray in other tongues, we will flow in the gifts of the spirit as the Holy Spirit guides, and signs miracles and wonders do follow us because we believe.